92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
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#include "wmmixer-alsa.h"
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void init_mixer(void)
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{
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int err;
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if((err=snd_mixer_open(&mixer_handle,CARD_NUM,MIXER_NUM))<0)
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{
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fprintf(stderr,"Mixer open failed: %s\n",snd_strerror(err));
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return;
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}
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init_elements();
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return;
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}
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void init_elements(void)
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{
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int err,i;
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count=0;
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memset(&elements,0,sizeof(elements));
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if((err=snd_mixer_elements(mixer_handle,&elements))<0)
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{
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fprintf(stderr,"Elements error: %s\n",snd_strerror(err));
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return;
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}
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elements.pelements=(snd_mixer_eid_t *)malloc(elements.elements_over*sizeof(snd_mixer_eid_t));
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if(!elements.pelements)
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{
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fprintf(stderr,"Elements error: Not enough memory\n");
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return;
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}
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elements.elements_size=elements.elements_over;
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elements.elements_over=elements.elements=0;
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if((err=snd_mixer_elements(mixer_handle,&elements))<0)
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{
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fprintf(stderr,"Elements error: %s\n",snd_strerror(err));
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return;
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}
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for(i=0;i<elements.elements;i++)
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{
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elementinfo *e;
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if(elements.pelements[i].type!=SND_MIXER_ETYPE_VOLUME1)
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continue;
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if(snd_mixer_element_has_control(&elements.pelements[i])!=1)
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continue;
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if(snd_mixer_element_has_info(&elements.pelements[i])!=1)
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continue;
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e=add_element();
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e->element.eid=elements.pelements[i];
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if((err=snd_mixer_element_build(mixer_handle,&e->element))<0)
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{
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fprintf(stderr,"Element error: %s\n",snd_strerror(err));
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return;
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}
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e->info.eid=elements.pelements[i];
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if((err=snd_mixer_element_info_build(mixer_handle,&e->info))<0)
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{
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fprintf(stderr,"Element info error: %s\n",snd_strerror(err));
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return;
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}
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count++;
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}
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free((void *)elements.pelements);
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return;
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}
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elementinfo *add_element(void)
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{
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if(!element)
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{
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element=(elementinfo *)malloc(sizeof(elementinfo));
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element->next=NULL;
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element->prev=NULL;
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memset(&element->info,0,sizeof(element->info));
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memset(&element->element,0,sizeof(element->element));
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return element;
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}
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else
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{
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elementinfo *e;
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e=element;
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while(e->next)
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e=e->next;
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e->next=(elementinfo *)malloc(sizeof(elementinfo));
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e->next->prev=e;
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e=e->next;
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e->next=NULL;
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memset(&e->info,0,sizeof(e->info));
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memset(&e->element,0,sizeof(e->element));
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return e;
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}
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}
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